Multiply bag



June 2l, 1927.

J. N. TOOKER ET AL MULTIPLY BAG Filed July 28. 1925 4 Sheets-Sheet 1 `{VI/'EN T OR( BW A TTORNE Yf 1,633 296 June 2l, 1927. J. N. TOOKER ET AL I MULTIPLY BAG Filed Jply 28, 1925 4 Sheets-Sheet 2 l a@ cw Tiff- ATroRNEYf June 21 1927 J. N. TOOKER ET AL MULTIPLY BAG 1925 4 .sheets-sheet 3 Filed July 28 lHWENTOM A TTORNEYJ June 21, 1927. 1,633,296

J. N. TOOKER ET AL MULTIPLY BAG Filed July 28, 1925 4 Sheets-Sleet 4 INVENTORI A TT ORNE YF Patented June 21, 1927.

UNITED STATES PATENT OFFICE.

J OI'IN N. TOOKER AND JOHN F. HARLEY, 0F CANAJ'OHARIE, NEW YORK, ASSIGNORS TO ARKELL & SMITHS, OF CANAJ'OHARIE, NEW YORK, A CORPORATION OF NEW YORK.

MULTI-FLY BAG.

Application led July 28, 1925.

Our invention relates to multi-ply bags, more particularly to multi-ply paper bags for cement and other weighty substances, and has for its object to provide anovel paper bag made of two or more thicknesses in which the closure at the top or bottom is formed by securing overlapping flaps by glue or other adhesive, each ply being secured substantially independently of the other so as to form a. firmly secured yet supple flat closure. Another object of our invention is to provide a flat closure multi-ply bag, the closure of which is secured bv glue applied to one side only of the several plies of the Hap in an ordinary bag closure forming machine.

The following is a description of our invention as embodied in our improved bag and the method of producing the same, reference being had to the accompanying drawings, in which,

Fig. 1 shows in perspective the bag having bottom and top closures embodying our invention;

Fig. 2 shows the method of forming multiply tube sections for our improved bag;

Fig. 3 shows one of these sections` unfolded;

Fig. 4 shows one of these sections with the liaps laid back to show more clearly the relations of the seams in the outer and inner layers of two-ply tubing;

Fig. 5 is an enlarged detail of one of the tube sections, parts being' broken away;

Fig. 6 is a section on theline 6 6, Fig. 5;

Fig. 7 is a tube section of Fig. 5, after the iii-st bottomingfolds have been made;

Fig. 8 is a section on the line 8-8, Fig. 7

Fig. 9 shows the completed bottom of the bag with parts turned back and parts broken away;

Fig. 10 is a section on the line 1010, Fig. 9;

Fig. 11 shows the seal after the first seal-.` ing folds are made and the glue applied, ay

portion being broken away;

Fig. 12 shows a tube section for a threeply bag, parts being broken away, and parts folded back; and

Fig. 13 shows a tube section of Fig. 12, after the first bottoming ,folds have been made and adhesive applied.

Referring more particularly to the drawings, Fig. 1 shows the complete bag with the sealing machines.

Serial No. 46,540.

folded bottom closure 2 and the folded valve closure Lt. In making this bag we first form a tube 6 which is cut up into sections 8. As each section 8 is cut ott' we fold about it the sheet 10, as shown at 12. In forming these tubes adhesive is applied to the outer or overlapping edges, so that when the tube is folded the two edges of the respective plies are secured together. After the sheet l0 is formed into a tube about a section 8 it is severed at a point 14.- midway between successive sections 8, which sections are spaced apart, as shown at 16, so'that the outer tubular section extends beyond the inner tubular section at both ends, producing what is hereafter described as a shingle effect. In forining these sections the Ordinary grip tab 1S is formed at one end on the outer ply of thel section and a corresponding recess is formed on the opposingend of the outer ply of the preceding section.

Prior to the folding of the outer ply about the inner ply, short longitudinally extending lines of adhesive 2O are applied to the bottom and top surfaces of the inner tube, eX-

tending al few inches from each end so that the innerply is locally secured to the outer ply adjacent to its top and bottom ends, so as to enable the multi-ply tube to be bottomed and sealed in ordinary bottoming and These short lines of the glue upon the top and bottom ends of the inner ply are shown in dots in the developed Fig. 3, and are also shown in the sectional View, Fig. 6, which also shows the adhesive strips 22 and 24 securing the edges ot the tubes.

The bottom end of the tube is then slit along the lines 26 and the resulting side flaps 28 and 30 pulled in one direction, while the side naps 32 and 34 are pulled in the opposite direction, as shown in Fig. 7. This is done by pulling on theouter flaps 28 and 32, the inner flaps and 34 following on account of the adhesive 20 locally connecting them thereto. lThis causes the edges of the bag 36 and 38 to fold inwardly to form end flaps as shown in Fig. 7, the side and end flaps to lie in substantially the same surface, which, in the bottoming machine, conforms to the-surface of a cylinder. After the parts have been thus opened up, adhesive 40 is applied to the exposed faces of the shingled side fiaps 28 and 30 and the exposed faces substantially independently of the flap lposed between the flaps 28 and 30.

of the end flaps 36 and 38, this adhesive being` in the shape of a letter ll. lifter the adhesive has been applied, one portion of the bottoni With the side flaps 32 and Si is folded over valong lthe line 42, and the other, with the side flaps 2S land BO, is -folded over on top of it along the line 44, as shown in Fig. 10, producing the bottom of the bag, as shown in Figs. l and 9. lt will be noted that when so folded the flap SO issecured to the end of the flap 32 at one point, While the flap 2S is secured to said iiap a little further along. There being no extended glue between the vopposinglfaees on `the 'flaps28 and 30, the flap 30 is'secured'to the flap 32 2S and the flap 28 is secured to the flap 32 substantially inde )en'den'tly of ythe flap 80. This securing of hese flaps of the several layers substantially independently results in a stronger seal than Would be present if the flaps 28 and 30 were of equal length, and the flap4 28 Was not directly secured to the flap 32, and, furthermore, results in a more supple bottoni than if `the glue Were interrl'lhe side flaps 32 and 3e are also secured by adhesive to the end `flaps 36 and 38. One end flap being folded along the line has one outer portion glued to another portion of itself and to the outer surface of liap 82 (E ig. l0).

It will be noticed that in the central'portion of the bottoni of a two-ply bag Sand 10,), thepaper between the ends ofthe tlaps 36 and 38 is only three-ply and that in a section which includes either end flap 36 or 38, there are five layers of paper. If the two layers of paper of the inulti-ply tube did. not overlap at the tube end there Would be four thicknesses of paper on the section between the end Aflaps 36 Vand 38 and six layers of paper von the sectionk passing through either end flap 36 and 28.a11d extended interrnediate adhesive would be required to secure the outer ply of the outer side flap.

The several plies of the overlyingside iiap have portions-in direct Contact with the outer ply of the otherside flap and secured 'thereby by adhesive, and the end edges of the plies of said outer side flap are parallel to the end edges of the plies of said inner side flap.

ln forming the valve el, the construction is `the saine except that the flaps are shorter, as shown in Fig. l1, and one leg of the adhesive` UA is shortened, as shown at il@ in Fig. 1ly so as not to fully :seal vone end flap. It 'will'be seen, however, that thevalve can still be formed in our improved"multiplybag,

and the advantages ofthe separate. vsecur-` k ing of thefplies of the'iaps retained.v

n Vfhen ya bag having a greater number of thicknesses, suoli as a three-ply bag, is desired a slnnlar procedure 1s followed," there being three tubular sections closely fitting shown in Figs. l2 and 13, glue being lo `cally applied'to-both sidesofthe inner tube sections, along ylongitudinal lines for short distances, as shown at 4S and 50, Fig. l2. lhe bottoni is slit and opened as before and adhesive is then applied to all of one set of flaps and across the outer side flaps 54 and 46, whereupon the bag bottoni is folded first along the line 58 and then along the line '60 so as to complete the bottoni, the

`three side flaps 52 of the bottom being in 'this case also substantially independently secured to the outer ply of the slide flap 62, so yas to securethe advantage of independent gluing andthe flexibility due to the omission of extended adhesive between the layers ln forming the multi-ply tube an inner -is transniitted to its next` succeeding tube and all tubes act together to simultaneously resist such strain. ln the bottoni also any strain which is present will be si1nultancously resstedby the plies of the flap to "which the glue is applied, and much of it is transmitted by the end flaps 3G `and 38 to the sid-e flap 34T so that the inner ply 84 in ther flap portions 32-34 relieves to soine i extent strain upon the outer ply 32. The extension of the flap 28 beyond the flap 30 produces a shingle effect siinilar to the shingles upon a roof, and the glue applied to the flaps 2S and 30 for that reason does not substantially Work beneath theply 30, although in the squeezing operation in ni'anufacture it inayu'vorlr beneath thc ply 30 to a slight extent, Ybutfnot so las tointerfere with the `advantage of single-ply 'gluing above referred to. in vieu7 of this We have referred to the flaps28and 30 as `shingled ltraps, meaningthereby partially overlapping flaps foi-producing the results above specifled.

in carrying out the inetho'd of producing a two-ply valved `bag in accordai'lce with kour invention, We first forin a two-ply tube in Whiehthe ends of the inner ply -are out of alineinent with the ends of the outer ply so asto produce an internal shingled effect, the inner ply being secured to the outer `ply on bot-h sides by short "lines yof adhesive adjacent to the ends of the inner ply. le hen slit the endsof the tube so as to form opposed side and end flaps and separate the side flaps,` and after alliplying adhesive to one set of 'sidefiiaps and to the end flaps, fold the other set of side flaps in and then foldthe adhesive bearing side flap over on to then] andv thus produce the desiredclosed bottom. The valve is produced in a similar manner except for the oinission of the adhesive on a part of one end flap.

As will be evident to those skilled in the art, our invention permits of various modilications without departing from the spirit thereof or the scope of the appended claims.

What we claim is:

l. In a multi-ply bag, the combination of two tubes, one itting within the other and in shingled relation at adjacent ends thereof, said shingled ends having inwardly extending multi-ply end flaps and inwardly extending shingled multi-ply side iiaps overlapping said end iaps, one of said multi-ply side flaps overlying the other multi-ply side iiap, and adhesive independently securing the shingled portions of the several layers of the multi-ply side flap directly to the external layer of the other multi-ply side iiap.

2. In a multi-ply bag, the combination of two tubes, one fitting within the other and in shingled relation at adjacent ends thereof, said shingled ends having inwardly extending multi-ply end flaps and inwardly extending shingled multi-ply side flaps overlapping said end flaps, one of said multiply side flaps overlying the other multi-ply n side flap, and adhesive independently securing the shingled portions of the several layers of one multi-ply side flap directly to the external layer of the other multi-ply side flap, and adhesive securing an inner and outer shingled layer of the under multi-ply side iiap directly to the outer layers of the end flaps.

In a multi-ply bag, the combination of two tubes, one fitting within the other and in shingled relation at adjacent ends thereof, said shingled ends having inwardly extending multi-ply end flaps and inwardly extending shingled multi-ply side flaps overlapping said end iaps, one of said multi-ply side flaps overlying the other multi-ply side flap, adhesive independently securing the shingled portions of the several layers of one multi-ply side flap directly to the external layer of the other multi-ply side iiap, adhesive securing an inner and outer shingled layer of the under multi-ply side flap to the outer layers of the end flaps, and adhesive securing the inner layer of the outer multiply side flap to the outer layers of the end flaps.

el. In a multi-ply bag, the combination of two tubes, one fitting within the other and in shingled rela-tion at adjacent ends thereof, said shingled ends having inwardly extending multi-ply end flaps and inwardly extending shingled multi-ply side iaps overlapping said end flaps, one of said multiply side fiaps overlying the other multi-ply side flap, and adhesive independently securing the shingled portions of the layers of one multi-ply side flap directly to the external layer of the other multi-ply side flap, successive layers of the multi-ply side flaps being locally secured to each other directly by adhesive. f

In the method of making a multi-ply ba'g, the improvement which consists in forming a tubular section and forming about said tubular section a. second tubular section, and spacing the end of said first section within and away from the corresponding end of the outer tube section so as to produce a shingled relation, securing opposing surfaces of* said sections together locally adjacent to the spaced away end of the inner section, slitting the spaced ends of said tube sections to form two shingled side flaps and two end iiaps, folding said end flaps inwardly and then folding said side flaps inwardly and securing the several plies of the outer shingled side flap directly to the outer ply of the inner side flap by adhesive.

6. In a multi-ply ba'g, the combination of two tubes, one fitting within the other and in shingled relation at adjacent ends thereof, said shingled ends having inwardly extending multi-ply end flaps and inwardly extending multi-ply side flaps having shingled portions overlapping said end flaps, one of t said multi-ply side flaps overlying the other muiti-ply side flap, and adhesive independently securing shingled portions of the several layers of one multi-ply side iiap to the external layer of the other multi-ply side flap, and adhesive separately securing the shingled portions of the inner and outer layers of the under multi-ply side flap directly to the outer layers of the end flaps.

7. In a. multi-ply bag having two tubular sections, one being within the other and shingled at adjacent ends thereof, inwardly extending multi-ply end flaps, inwardly extending inulti-ply side flaps overlapping said end tiaps, one end of said overlying multi-ply i side flap overlapping' the other multi-ply side flap, the several plies of the overlying side la p each having shingled portions contacting directly with the outer ply of the other side flap and adhesive securing said contacting 2 5 portions of said several plies directly to said outer ply, the end edges of the plies of said outer side flap being parallel to the end edges of the plies of said inner side flap.

8. In a multi-ply bag having two tubular sections, one being within the other and shingled at adjacent ends thereof, inwardly extending multi-ply end flaps, inwardly extending multi-ply side flaps overlapping said end flaps, one end of said overlying multi-ply side flap overlapping the other multi-ply side flap, the several plies of the overlying side flap having shingled portions contacting directly with the outer ply of the other side flap and adhesive securing said contacting vportions `of said several Yplies `to laid `ddhesve Secuririglhe saine to the other said 4@hier ply, the end edges of the plies plies oil .said end o Said outer side flap being; parallel to the In testinwny Wiereof, We have signed our l0 end edges of the plies of said inner side flap, mines to this speeilication this Qh day ol' and the several plies of the underlying side July, i

flap each having partielle making direct conn ,IO-HN N. TOKER. tact with lthe outer plies lel said end flaps JOHN F. HARLEY. 

